{"id":"CVE-2026-35599","summary":"Vikunja has an Algorithmic Complexity DoS in Repeating Task Handler","details":"Vikunja is an open-source self-hosted task management platform. Prior to 2.3.0, the addRepeatIntervalToTime function uses an O(n) loop that advances a date by the task's RepeatAfter duration until it exceeds the current time. By creating a repeating task with a 1-second interval and a due date far in the past, an attacker triggers billions of loop iterations, consuming CPU and holding a database connection for minutes per request. This vulnerability is fixed in 2.3.0.","aliases":["GHSA-r4fg-73rc-hhh7","GO-2026-5608"],"modified":"2026-07-31T18:30:30.106996816Z","published":"2026-04-10T16:05:57.581Z","related":["openSUSE-SU-2026:21483-1"],"database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/35xxx/CVE-2026-35599.json","cna_assigner":"GitHub_M","cwe_ids":["CWE-407"]},"references":[{"type":"WEB","url":"https://github.com/go-vikunja/vikunja/releases/tag/v2.3.0"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/35xxx/CVE-2026-35599.json"},{"type":"ADVISORY","url":"https://github.com/go-vikunja/vikunja/security/advisories/GHSA-r4fg-73rc-hhh7"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-35599"},{"type":"FIX","url":"https://github.com/go-vikunja/vikunja/commit/6df0d6c8f54b01db6464c42810e40e55f12b481b"},{"type":"FIX","url":"https://github.com/go-vikunja/vikunja/pull/2577"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/go-vikunja/vikunja","events":[{"introduced":"0"},{"fixed":"28b537837f9808dc106c9058b5829c65759fddf2"},{"fixed":"6df0d6c8f54b01db6464c42810e40e55f12b481b"}],"database_specific":{"extracted_events":[{"introduced":"0"},{"fixed":"2.3.0"}],"source":["CPE_RANGE","REFERENCES"],"cpe":"cpe:2.3:a:vikunja:vikunja:*:*:*:*:*:*:*:*"}}],"versions":["v2.2.2","v2.2.1","v2.2.0","v2.1.0","v2.0.0","v1.1.0","v1.0.0","v1.0.0-rc4","v1.0.0-rc3","v1.0.0-rc2","v1.0.0-rc1","v1.0.0-rc0","v0.24.1","v0.23.0","v0.22.1","v0.22.0","v0.21.0","v0.20.4","v0.20.3","v0.20.1","v0.20.0","v0.19.2","v0.19.1","v0.19.0","v0.18.1","v0.18.0","v0.17.0","v0.16.0","v0.15.0","v0.14.0","v0.13","v0.12","v0.11","v0.10","v0.9","v0.8","v0.7","v0.6","v0.5","v0.4","v0.3","v0.2","v0.1"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-35599.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"}]}